FPV Tiny Tank using a 18650 Li-ion cell

This is a FPV RC tiny tank designed with an idea of having a small form factor while providing longer driving times than other similar tanks using a LiPo battery. The 18650 Li-ion cell has a high energy density, which gives an opportunity to undertake "long range" missions with the tank. Personal experience shows that a 3200 mah cell let's you easily drive this for more than an hour. The tank also has controllable front LED lights.

Wiring diagram included (attached as an image).

Used parts list

(shorturls lead you to aliexpress for cheap options)

Electronics:

• FrSky Xm+ receiver (it's possible to use other SBUS receivers) https://shorturl.at/qHV05
• SBUS to PWM servo decoder https://shorturl.at/hN025
• 2x 9g SG90 servo motors https://shorturl.at/crCE4
• PWM signal control switch (controlling front LED lights) https://shorturl.at/enHIX
• Eachine TX04 3 in 1 video system https://shorturl.at/pGM78
• 2x 5mm LEDs
• 50 ohm 1/4 watt resistor
• 18650 Li-ion cell

Hardware:

• 2x M3x20mm screw (for passive wheels)
• 2x M2x6mm screw (for drive wheels)
• 4x M3x15mm screw (for connecting base and top chassis)
• 6x M3 4.2mm diameter heat insert nuts (2 for passive wheels and 4 for chassis connection) https://shorturl.at/cjC56
• Battery connectors (possible to salvage from old battery trays or be creative; see photos)
• 2x 6x19x6mm bearings (for passive wheels) https://shorturl.at/mIO13
• 4x 4x2mm magnets (for battery cover) https://shorturl.at/bgotW

Notes:

• Servo motors need to be modified for 360 degree rotation (there are plenty of tutorials on youtube)
• Top chassis and battery cover are connected with a single 1.75mm filament piece
• Every part except the tracks is printed with regular PLA. Tracks are printed out of flexible TPU
• More track designs coming soon!